CVE-2016-6662: Debian Linux

Critical severity, CVSS 9.8. EPSS: 67.7% chance of exploitation in the next 30 days.

Oracle MySQL through 5.5.52, 5.6.x through 5.6.33, and 5.7.x through 5.7.15; MariaDB before 5.5.51, 10.0.x before 10.0.27, and 10.1.x before 10.1.17; and Percona Server before 5.5.51-38.1, 5.6.x before 5.6.32-78.0, and 5.7.x before 5.7.14-7 allow local users to create arbitrary configurations and bypass certain protection mechanisms by setting general_log_file to a my.cnf configuration. NOTE: this can be leveraged to execute arbitrary code with root privileges by setting malloc_lib. NOTE: the affected MySQL version information is from Oracle's October 2016 CPU. Oracle has not commented on third-party claims that the issue was silently patched in MySQL 5.5.52, 5.6.33, and 5.7.15.

Affected products

• Debian Debian Linux: version 8.0 only
• MariaDB MariaDB: from 5.5.20, before 5.5.51 (fixed in 5.5.51); from 10.0.0, before 10.0.27 (fixed in 10.0.27); from 10.1.0, before 10.1.17 (fixed in 10.1.17)
• Oracle MySQL: from 5.5.0, up to and including 5.5.52; from 5.6.0, up to and including 5.6.33; from 5.7.0, up to and including 5.7.15
• Percona Percona Server: from 5.5, before 5.5.51-38.1 (fixed in 5.5.51-38.1); from 5.6, before 5.6.32-78.0 (fixed in 5.6.32-78.0); from 5.7, before 5.7.14-7 (fixed in 5.7.14-7)
• Red Hat Enterprise Linux: version 7.0 only
• Red Hat Enterprise Linux Desktop: version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Server: version 6.0 only
• Red Hat Enterprise Linux Server Aus: version 7.3 only; version 7.4 only; version 7.6 only
• Red Hat Enterprise Linux Server Eus: version 7.3 only; version 7.4 only; version 7.5 only; version 7.6 only
• Red Hat Enterprise Linux Server Tus: version 7.3 only; version 7.6 only
• Red Hat Enterprise Linux Workstation: version 6.0 only; version 7.0 only
• Red Hat Openstack: version 5.0 only; version 6.0 only; version 7.0 only; version 8 only; version 9 only

Published 2016-09-20. Last modified 2026-06-17.